var current=0;

function nextImage(imgName)
{
	if(document.images)
	{
		if(current < imgArray.length-1)
		{
			current++;
			document.images[imgName].src = imgArray[current].src;
		}
	}
	return false;
}

function prevImage(imgName)
{
	if(document.images)
	{
		if(current > 0)
		{
			current--;
			document.images[imgName].src = imgArray[current].src;
		}
	}
	return false;
}